High-performance NiCo2O4@Ni3S2 core/shell mesoporous nanothorn arrays on Ni foam for supercapacitors

摘要: Hierarchical NiCo2O4@Ni3S2 core/shell mesoporous nanothorn (NT) arrays were successfully designed and synthesized on the surface of Ni foam via a two-step process which includes hydrothermal synthesis electrodeposition. The obtained nanostructures consist NiCo2O4 NTs as core interconnected Ni3S2 ultrathin nanosheets shell, exhibit remarkable electrochemical performance for supercapacitors because heterogeneity synergies two components. Compared with single component either or nanosheets, hierarchical NT demonstrate higher specific capacitance 1716 F g−1 at current density 1 A better rate capability 1104 20 while maintaining 83.7% capacity after 2000 cycles 4 g−1. Such superior may originate from unique that would possess faster ion electron transfer, enhanced reactivity modified structural integrity.